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TRX 90 Big Bore kit
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Posted by: Dodge 1 Ton

Has anybody put a Big Bore kit in a TRX 90? C&D sent me a quote on the price but what else do I need to add If I go to the big Bore?Do I need a new carb, cam or just the kit?

Posted by: Pappy

an 11-1 piston and cam plus an exhaust really wakes up the 90. we went with a stock bore piston and it rips!

go up a tooth on the front sprocket and also there is power to be had by advancing the fly wheel.

Posted by: Dodge 1 Ton

Pappy

Did you advance the fly wheel by using a offset key?

What kind of cam?

Thanks

Posted by: Pappy

we used the powroll kit on advice from gt thunder.

we have not advanced the flywheel as of yet but again, based on the information gt thunder and colby at c&d gave me thats a hot little trick

Posted by: ROBBSRACING

The big bore kit alone will not do alot for you. A big carb and pipe would also be needed. Minimum. Its all a matter of how fast you want to go and how much you want to spend. Cam, porting, big valve head, ignition system and a 5spd. manual trans. would be nice too but how far do you want to go!

Posted by: Dodge 1 Ton

ROBBSRACING

Figured on porting. Already bought a pipe and header, but I was not sure about the carb. I am looking for a good place to start and work our way up.

Posted by: 212racing

icracing

Posted by: KILLER EX

quote:
Originally posted by ROBBSRACING
The big bore kit alone will not do alot for you. A big carb and pipe would also be needed. Minimum. Its all a matter of how fast you want to go and how much you want to spend. Cam, porting, big valve head, ignition system and a 5spd. manual trans. would be nice too but how far do you want to go!

Hi,ROBB this is nate .Hows the engine coming? have a nice day.

Posted by: ROBBSRACING

Whats up Nate?
The motors coming along. Im waiting on some parts rite now.
Give me a call when you get a chance.

Posted by: FasstMidnightZ

how come u just dont buy something bigger?

Posted by: Pappy

quote:
Originally posted by hondaexrider
how come u just dont buy something bigger?

you do realize that there are quite a few prepped 90's that will smoke your 250ex dont you

id imagine he has a kid and the kid maybe not old enough to race in any other class or the kid maybe small and a 90 is what he feels is safe for him to handle size wise.

Posted by: FasstMidnightZ

quote:
Originally posted by Pappy
you do realize that there are quite a few prepped 90's that will smoke your 250ex dont you

id imagine he has a kid and the kid maybe not old enough to race in any other class or the kid maybe small and a 90 is what he feels is safe for him to handle size wise.

easy i just asked a question

Posted by: Pappy

quote:
Originally posted by hondaexrider
easy i just asked a question

and now you have an answer.

Posted by: FasstMidnightZ

http://smileys.smileycentral.com/cat/23/23_30_115.gifhow do u get a 90 to go faster than a 250ex

Posted by: FasstMidnightZ

like what mods do they do to it

Posted by: Pappy

you can build the 90 engine using most of the common building tools....cam, pistons,overbore, stroker and pipe it, flywheel advance, use gearing, good airfilter etc.

then you drop a good rider on the quad and let it eat

Posted by: Arctic Cat Dad

I will say 1 thing. That cody at his age on this 90 will keep up with you in the woods anywhere you will go. This little mini quad will flat out fly. It is unreal how fast these mini quads can be made to run! If you got the money they have the parts. Cody is a GREAT rider. And this is one fine Trx 90. I couldn't believe how fast Michaels 70 is. Best $1200 I ever spent. And to think I can even make it faster. Well this plenty for now. But pappy you said 1 thing and it is the rider.And our kids have proved that.

Pappy tell every1 we all said Hi.

#838 01 Polini x3w-michaels
#838 01 Husqvarna cr50j-Michaels
#838 04 Arctic Cat 70-Michaels-70cc airsal kit,Hetrick power up kit C,Malossi reeds,Malossi cdi,Malossi clutch kit,Acerbis handguards,ProDesign kill,Rebel Gears,19" Holeshots on Alum.Douglas on front,18" Snowhogs on Alum. Douglas on rear. and more and more to come!
02 Yamaha Big Bear 400 4x4-mine
04 Suzuki DRZ 125L-Justins

2004 PKM Promotions XC Champion (4-6) 50cc open quad
Michael Mussi Jr. #838

Posted by: Pappy

hey i havent forgotton you and micheals pictures. we lost may dad this past week so ive been a bit distracted. pm me your address and i will make you a cd full of his photos for sponsors etc

Posted by: Arctic Cat Dad

Sorry to hear such sad news. Our thoughts are with you.I'll get you my address.

Posted by: KILLER EX

pappy what all do you have done to codys motor?

Posted by: Dodge 1 Ton

quote:
how come u just dont buy something bigger?

Becasue at his age that is what he has to ride. He was riding a 300ex but he cannot race it. So we sold it and are building a TRX 90.

Just wanted some info on Big Bore Kits and what was needed to go along with them. Seems the topic got off track.

Posted by: 911

hey rob easy on the engine

my son will be racin jr this year on a trx 90

Posted by: ROBBSRACING

Easy on the engine are you kiddin?

Posted by: Rico

Some interesting stuff at this link http://gtthunder.com/Mini%20Quads.htm